diff --git a/ecstore/src/bitrot.rs b/ecstore/src/bitrot.rs
index 757401557..68ccff71e 100644
--- a/ecstore/src/bitrot.rs
+++ b/ecstore/src/bitrot.rs
@@ -6,6 +6,7 @@ use crate::{
 };
 use blake2::Blake2b512;
 use blake2::Digest as _;
+use bytes::Bytes;
 use common::error::{Error, Result};
 use highway::{HighwayHash, HighwayHasher, Key};
 use lazy_static::lazy_static;
@@ -533,20 +534,26 @@ impl Writer for BitrotFileWriter {
         self
     }
 
-    async fn write(&mut self, buf: &[u8]) -> Result<()> {
+    async fn write(&mut self, buf: Bytes) -> Result<()> {
         if buf.is_empty() {
             return Ok(());
         }
-        self.hasher.reset();
-        self.hasher.update(buf);
-        let hash_bytes = self.hasher.clone().finalize();
+        let mut hasher = self.hasher.clone();
+        let h_buf = buf.clone();
+        let hash_bytes = tokio::spawn(async move {
+            hasher.reset();
+            hasher.update(h_buf);
+            hasher.finalize()
+        })
+        .await
+        .unwrap();
 
         if let Some(f) = self.inner.as_mut() {
             f.write_all(&hash_bytes).await?;
-            f.write_all(buf).await?;
+            f.write_all(&buf).await?;
         } else {
             self.inline_data.extend_from_slice(&hash_bytes);
-            self.inline_data.extend_from_slice(buf);
+            self.inline_data.extend_from_slice(&buf);
         }
 
         Ok(())
diff --git a/ecstore/src/erasure.rs b/ecstore/src/erasure.rs
index d99c7eea5..b4c45ff11 100644
--- a/ecstore/src/erasure.rs
+++ b/ecstore/src/erasure.rs
@@ -86,7 +86,6 @@ impl Erasure {
                 }
 
                 self.buf.resize(new_len, 0u8);
-
                 match reader.read_exact(&mut self.buf).await {
                     Ok(res) => res,
                     Err(e) => {
@@ -101,20 +100,22 @@ impl Erasure {
             }
 
             self.encode_data(&self.buf, &mut blocks)?;
-            let mut errs = Vec::new();
 
-            // TODO: 并发写入
-            for (i, w_op) in writers.iter_mut().enumerate() {
-                if let Some(w) = w_op {
-                    match w.write(blocks[i].as_ref()).await {
-                        Ok(_) => errs.push(None),
-                        Err(e) => errs.push(Some(e)),
+            let write_futures = writers.iter_mut().enumerate().map(|(i, w_op)| {
+                let i_inner = i.clone();
+                let blocks_inner = blocks.clone();
+                async move {
+                    if let Some(w) = w_op {
+                        match w.write(blocks_inner[i_inner].clone()).await {
+                            Ok(_) => None,
+                            Err(e) => Some(e),
+                        }
+                    } else {
+                        Some(Error::new(DiskError::DiskNotFound))
                     }
-                } else {
-                    errs.push(Some(Error::new(DiskError::DiskNotFound)));
                 }
-            }
-
+            });
+            let errs = join_all(write_futures).await;
             let none_count = errs.iter().filter(|&x| x.is_none()).count();
             if none_count >= write_quorum {
                 if total_size == 0 {
@@ -472,7 +473,7 @@ impl Erasure {
                 self.encoder.as_ref().unwrap().reconstruct(&mut bufs)?;
             }
 
-            let shards: Vec<Vec<u8>> = bufs.into_iter().flatten().collect::<Vec<_>>();
+            let shards = bufs.into_iter().flatten().collect::<Vec<_>>();
             if shards.len() != self.parity_shards + self.data_shards {
                 return Err(Error::from_string("can not reconstruct data"));
             }
@@ -481,7 +482,7 @@ impl Erasure {
                 if w.is_none() {
                     continue;
                 }
-                match w.as_mut().unwrap().write(shards[i].as_ref()).await {
+                match w.as_mut().unwrap().write(shards[i].clone().into()).await {
                     Ok(_) => {}
                     Err(e) => {
                         info!("write failed, err: {:?}", e);
@@ -501,7 +502,7 @@ impl Erasure {
 #[async_trait::async_trait]
 pub trait Writer {
     fn as_any(&self) -> &dyn Any;
-    async fn write(&mut self, buf: &[u8]) -> Result<()>;
+    async fn write(&mut self, buf: Bytes) -> Result<()>;
     async fn close(&mut self) -> Result<()> {
         Ok(())
     }
diff --git a/ecstore/src/io.rs b/ecstore/src/io.rs
index 7ecf8f84c..f2affe8cb 100644
--- a/ecstore/src/io.rs
+++ b/ecstore/src/io.rs
@@ -2,13 +2,13 @@ use bytes::Bytes;
 use futures::TryStreamExt;
 use md5::Digest;
 use md5::Md5;
-use tokio::sync::mpsc;
 use std::pin::Pin;
 use std::task::Context;
 use std::task::Poll;
 use tokio::io::AsyncRead;
 use tokio::io::AsyncWrite;
 use tokio::io::ReadBuf;
+use tokio::sync::mpsc;
 use tokio::sync::oneshot;
 use tokio_util::io::ReaderStream;
 use tokio_util::io::StreamReader;
diff --git a/ecstore/src/set_disk.rs b/ecstore/src/set_disk.rs
index b35c6ad89..77eafe01a 100644
--- a/ecstore/src/set_disk.rs
+++ b/ecstore/src/set_disk.rs
@@ -325,6 +325,7 @@ impl SetDisks {
             }
         }
 
+        let mut futures = Vec::with_capacity(disks.len());
         if let Some(err) = reduce_write_quorum_errs(&errs, object_op_ignored_errs().as_ref(), write_quorum) {
             // TODO: 并发
             for (i, err) in errs.iter().enumerate() {
@@ -334,26 +335,30 @@ impl SetDisks {
 
                 if let Some(disk) = disks[i].as_ref() {
                     let fi = file_infos[i].clone();
-                    let _ = disk
-                        .delete_version(
-                            src_bucket,
-                            src_object,
-                            fi,
-                            false,
-                            DeleteOptions {
-                                undo_write: true,
-                                old_data_dir: data_dirs[i],
-                                ..Default::default()
-                            },
-                        )
-                        .await
-                        .map_err(|e| {
-                            debug!("rename_data delete_version err {:?}", e);
-                            e
-                        });
+                    let old_data_dir = data_dirs[i];
+                    futures.push(async move {
+                        let _ = disk
+                            .delete_version(
+                                src_bucket,
+                                src_object,
+                                fi,
+                                false,
+                                DeleteOptions {
+                                    undo_write: true,
+                                    old_data_dir: old_data_dir,
+                                    ..Default::default()
+                                },
+                            )
+                            .await
+                            .map_err(|e| {
+                                debug!("rename_data delete_version err {:?}", e);
+                                e
+                            });
+                    });
                 }
             }
 
+            let _ = join_all(futures).await;
             return Err(err);
         }